I've been listening to AC/DC since the early 80's and not once had I ever heard of, or ever thought that the lyrics to Highway to Hell would be misconstrued as racist.
Maybe the listener is hearing what he's wanting to hear?
In my senior year of high school I became a born again christian, and this was mostly due to my mom's overwhelming influence in forcing religion down my throat. During this time I started seeing evil and demon's everywhere in society. Album covers, tv, music, people...started seeing what I thought were people choosing to follow what the christian lifestyle would label as evil.
I saw what I wanted to see, and it brought me no happiness or joy in my life.
Later on in 1982 I went into the USAF and everything changed for me, once again. I wasn't seeing evil everywhere because I had stopped looking for it. I had too much to worry about in making it through basic military training and staying off the drill instructor's S**T list.
The point I'm trying to make is people see what they want to see, and HEAR what they want to hear.
Another 10,000 posts in this thread which state the actual lyrics to Highway to Hell probably won't convince the author of the first post in this thread that there is no racist word IN those lyrics.
I'm truly convinced he hears what he wants to hear, and nobody here can convince him otherwise because he already has his mind made up.
AND...life goes on.